Walnut Creek police announced Wednesday the arrests of three suspects in a months-long investigation into narcotics sales in and around downtown nightclubs.

Much of the investigation has been centered on the Lift Lounge on Locust Street, where police set up surveillance and observed drug sales both in the club and in an adjacent parking lot.

In February, Benyam Yohannes, 24, of Walnut Creek was arrested at the club and has been charged with felony possession and transportation of a controlled substance for sale by the Contra Costa County District Attorney’s Office.

More recently, Brittany Borgognone, 25, of Walnut Creek and Hector Rodriguez, 44, of Martinez were arrested July 3 and 6, respectively, for narcotics-related offenses in the case.

Borgognone was charged with possession and transportation of a controlled substance for sale and Rodriguez with possession of concentrated cannabis and driving under the influence. Both have been released from custody, but police expect to present their case against them soon.

In the three arrests, police confiscated just under a pound of cocaine and smaller amounts of marijuana.

Update: Jasmine Butler, who owns the LIFT Lounge, said two of the three suspects have been banned from the bar for months and she would have gladly worked with investigators had she known the nightclub was under scrutiny.

“If we suspect someone of doing something wrong we keep them out of the business,” she said. “I would’ve been willing to help in any way, shape or form, but it’s hard when you don’t even know what’s going on.”